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  1. M

    Blow-by on a high compression motor-remedies?

    uploaded a few
  2. Mr Nasty NHMS 2012

    Mr Nasty NHMS 2012

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    • Album: Mr.Nasty (Yamaha 447 XS 750 Sidecar)
  3. sidecar MidO

    sidecar MidO

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  4. MrNasty ME

    MrNasty ME

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  5. mrnasty

    mrnasty

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  6. Mr.Nasty (Yamaha 447 XS 750 Sidecar)

    Mr.Nasty (Yamaha 447 XS 750 Sidecar)

    Pics of my rig.
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  7. M

    Blow-by on a high compression motor-remedies?

    Hi all, New to this forum, but not new to XS's. I race a vintage sidecar with a 750 kitted 447 motor, 10:1 compression, Megacycle cam, etc. My question is in regards to blow-by. I have my motor set up with adequate venting, top and bottom end (with one-way check valves) but unfortunately get a...
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